

You may know this already, but mints, raspberries/blackberries, and lemon balm will completely take over a space over time. You are probably okay for this year since it’s a new planting, but I would highly recommend repotting it at the end of the season into a separate, contained pot. It can still hang out near your bed and provide some pest management! Just best to keep it separate so you’re not pulling it up constantly.
I am a flower freak, so I would just plant a ton of hellebores. That is what I’ve done with a very shady spot in my backyard, and now I have hundreds of blooms I can cut from and bring inside from January to April. They are never going to be super tall, but they are massive now! I also have hydrangeas (including oak leaf, which give pretty autumn foliage), astilbe, heuchera, sanguisorba, ferns, and rhododendrons in shade, as others have mentioned.